EP1412606A1 - Schlagvorrichtung - Google Patents
SchlagvorrichtungInfo
- Publication number
- EP1412606A1 EP1412606A1 EP02748898A EP02748898A EP1412606A1 EP 1412606 A1 EP1412606 A1 EP 1412606A1 EP 02748898 A EP02748898 A EP 02748898A EP 02748898 A EP02748898 A EP 02748898A EP 1412606 A1 EP1412606 A1 EP 1412606A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- impact
- stress
- impact device
- pressure fluid
- space
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011435 rock Substances 0.000 claims abstract description 3
- 239000012530 fluid Substances 0.000 claims description 33
- 229910052729 chemical element Inorganic materials 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims 2
- 238000007599 discharging Methods 0.000 claims 1
- 238000009527 percussion Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000001902 propagating effect Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B1/00—Percussion drilling
- E21B1/38—Hammer piston type, i.e. in which the tool bit or anvil is hit by an impulse member
Definitions
- the invention relates to an impact device for a rock drill or the like, comprising means for delivering a stress pulse at a tool connected to the impact device.
- a stroke is generated by means of a reciprocating percussion piston, which is typically driven hydraulically or pneumatically and in some cases electrically or by means of a combustion engine.
- a stress pulse is generated in a tool, such as a drill rod, when the percussion piston strikes an impact surface of either a shank or a tool.
- a problem with the prior art impact devices is that the reciprocating movement of the percussion piston produces dynamic accelerating forces that complicate control of the apparatus.
- the drill tends to simultaneously move in the opposite direction, thus reducing the compressive force of the end of the drill bit or the tool with respect to the material to be processed.
- the impact device In order to maintain a sufficiently high compressive force of the drill bit or the tool against the material to be processed, the impact device must be pushed sufficiently strongly towards the material. This, in turn, requires the additional force to be taken into account in the supporting and other structures of the impact device, wherefore the appa- ratus will become larger and heavier and more expensive to manufacture. Due to its mass, the percussion piston is slow, which restricts the reciprocating frequency of the piston and thus the striking frequency, although it should be significantly increased in order to improve the efficiency of the impact device. However, in the present arrangements this results in far lower efficiency, wherefore in practice it is not possible to increase the frequency of the impact device.
- An objective of the present invention is to provide an impact device where the dynamic forces generated by impact operation have less disadvantageous effects than in the prior art arrangements, such devices ena- bling easier increase of the reciprocating frequency.
- the impact device according to the invention is characterized by what is disclosed in the appended claims.
- a stroke is provided by one or more elastic impact elements, which are subjected to a stress state for storing energy for each stroke.
- the stress state the length of the element changes with respect to its length in a non-stress state, and the stress state of the impact element is suddenly released, whereupon the element tends to return to its rest length and to deliver a stroke, or to direct a stress pulse, at the tool by means of the stored stress energy.
- the invention has the advantage that an impulse-like impact movement generated as described above does not require a reciprocating percussion piston, but the change in the length of the elastic impact element is in the order of a millimetre. As a result, there is no need to move large masses back and forth in the impact direction, and the dynamic forces are small compared to the dynamic forces generated by the heavy reciprocating percussion pistons used in the prior art arrangements. Furthermore, such a structure enables an increase of the reciprocating speed without essential deterioration of efficiency.
- FIG. 2 shows schematically an embodiment of an impact device according to the invention
- FIG. 3 shows schematically another embodiment of the impact device according to the invention
- FIG. 4 shows schematically a third embodiment of the impact device according to the invention
- Figure 5 shows schematically a fourth embodiment of the impact device according to the invention
- Figure 6 shows an embodiment of an impact element according to the invention.
- FIG. 1 shows schematically an operating principle of an impact device according to the invention.
- a broken line in the figure shows an impact device 1 and a frame 1a thereof, which encloses an elastic impact ele- ment 2.
- the impact element 2 is compressed or alternatively stretched to such an extent as to change the length of the element compared to its rest length. In a practical implementation, this change is of the order of a millimetre, i.e. for example between 1 and 2 mm. Straining the impact element naturally requires energy, which is directed at the element 2 either mechanically, hydrau lically or hydromechanically, as shown by means of practical examples in Figures 2 to 6.
- the impact element is prestressed, e.g.
- the impact device 1 is pushed forward so that an end of a tool 3 is pressed firmly against the end of the impact device either directly or via a separate connecting piece, such as a shank or the like.
- the impact element is suddenly released from compression, whereupon it tends to return to its natural length.
- a stress wave is generated in the drill rod or some other tool, and in propagating to the tool end the wave produces a stroke in the material to be processed, similarly as in the prior art impact devices.
- the ratio of the impact element and the prestress thereof or the propagating stress wave, respectively is such that the length of the stress wave is twice the length of the strained part of the impact element, and correspondingly the strength of the stress wave is half the stress reserved in the impact element for the impact. In practice, these values change due to losses.
- Figure 2 shows schematically an embodiment of an impact device according to the invention, where the impact element 2 is located with respect to the frame 1a of the impact device such that the element's end situated away from the tool 3 is supported to the frame 1 a of the impact device 1 and the element is compressed at the end near the tool 3 by a hydraulic piston 4.
- the figure further shows schematically support jaws 5a and 5b, and corresponding shoulders 2a and 2b situated in the impact element 2. If the behaviour and the pulse properties of the impact element are to be varied, it is possible to use either the entire length l_ ⁇ of the impact element 2 beginning from the piston, or one of the corresponding shoulders 2a, 2b, the corresponding support jaws and the respective length L 2 or L 3 of the impact element 2 to be stressed.
- the element is compressed schematically by means of hydraulic fluid supplied to a pressure space 6 behind the piston 4, so that the entire length of the impact element shown to the left of the piston 4 in the figure will be strained.
- the length of the impact pulse is approximately twice L
- FIG. 3 shows another embodiment of the impact device according to the invention.
- the impact element is strained by means of a separate pivot mechanism, which is driven by a hydraulic piston mechanism moving transversely to the impact element.
- the pivot mechanism comprises support elements 7a and 7b that are parallel to an axis transverse to the central axis of the impact element. Between the support elements there is an actuator 7c, which is supported via supporting arms 8a and 8b to elements 7a and 7b.
- the piston 9 in turn comprises an elongated opening 9a in the middle, the actuator 7c extending thereto.
- the piston 9 comprises two transverse rods 9b on both sides of the im- pact element 2, so that the forces acting on the actuator 7c are symmetrically in balance.
- the piston 9 When the piston 9 is moved to the right in the figure, it pushes the actuator 7c in the same direction, thus forcing, via the supporting arms 8a and 8b, the support elements 7a and 7b to move further apart, whereupon a force is generated in the impact element 2 in a direction denoted by arrow A.
- the actuator 7c crosses the centre line between the support elements 7a and 7b, it is able to swing freely to the right in the figure, whereupon the support elements 7a and 7b will be again able to move closer together and the tension in the impact element 2 is released in the form of a stress pulse directed at the tool.
- the pivot mechanism is similarly lengthened and rapidly shortened in the opposite direction, thus resulting in a new stress pulse directed at the tool.
- FIG 4 shows schematically a third embodiment of the impact device according to the invention.
- the figure shows straining of the impact element 2 by means of a hydromechanical arrangement.
- the impact element comprises a shoulder 2' situated with respect to the frame of the impact device such that a pressure fluid space 10 is formed between the annular shoulder and the impact device.
- Hydraulic fluid is first supplied to this space 10 at a normal hydraulic feed pressure.
- the impact element 2 can be subjected to different stress, and the shape and strength of the stress pulse formed can thus be adjusted by varying the pressure of the hydraulic fluid to be fed, or the prestress pressure.
- the pressure fluid space 10 is thereafter closed and a separate booster piston 11, which is driven by a mechanical trigger element 12, is also used.
- the trigger element further comprises a shoulder 12a facing the bearing cylinder 13, the cylinder rotating along the shoulder during use.
- the trigger element when the trigger element is moved in a direction indicated by arrow B, i.e. to the left in the figure, after the pressure fluid space 10 has been filled with hydraulic fluid of a desired pressure, the element pushes the booster piston 11 towards the pressure fluid space 10 due to the shoulder 12a of the bearing cylinder 13. Since a pressure fluid channel leading to the pressure fluid space 10 was closed before the trigger element 12 started moving, the space 10 is enclosed and the insertion of the booster piston 11 towards the space 10 reduces the volume and increases the pressure, thus further straining the impact element 2.
- the stress is quickly released from the impact element to the tool not shown in the figure.
- the speed can be increased e.g. by opening a channel from the pressure fluid space 10 to a pressure medium space or some other space substan- tially simultaneously, so that the hydraulic fluid can flow thereto from the pressure fluid space 10 with as small losses as possible.
- the working phase can be restarted and repeated to obtain a desired reciprocating frequency.
- the mechanical structure of the booster piston 11 can be re- placed with a hydraulic structure.
- the end of the booster piston 11 opposite to the pressure space 10 is provided with a pressure surface, which is greater than the pressure surface facing the space 10.
- This greater pressure surface is thereafter provided with a normal pressure of pressure medium, so that the surface pushes the booster piston 11 towards the pressure space 10 until the product of the pressure acting on each side and the corresponding surface area is the same in each side of the booster piston.
- pressure medium is again allowed to flow rapidly out of either the space 10 or the space behind the booster piston 11 , the tension in the impact element 2 is quickly discharged, which results in a stress pulse in the tool.
- FIG. 5 shows a fourth embodiment of the impact device according to the invention.
- This embodiment utilizes several impact elements connected in series and strained simultaneously. This can be implemented e.g. by using a solid rod as the middlemost impact element, and sleeve-like ele- ments imposed on each other around the rod.
- these sleeve-like elements 2" and 2"' are shown in a sectional view for the sake of illustration.
- the end of each sleeve-like element is provided with a shoulder, against which the middle rod or the next sleeve-like element is supported.
- the operating length of the impact element is the sum of the lengths of all the anterior impact elements 2' to 2'".
- the practical length of the impact device can be shortened by one whole impact element, while maintaining the properties of the stress pulse obtained by the impact element.
- the innermost rod-like impact element 2' and the outermost sleeve-like impact element 2"' are subjected to a compressive force by way of an example, whereas the middlemost sleeve-like impact element 2" situated between the two other elements is subjected to tensile stress. Therefore, in such an arrangement every other impact element is subjected to compression stress and every one other one to tensile stress.
- the figure also shows a structure of an impact element suit- able for implementing the impact device according to the invention.
- the impact element is formed of several parallel components, which are of the same length, however.
- the length of the impact element is equal to the length of these components, and in other respects the element corresponds to an individual impact element of the same length and with a corresponding cross-section.
- FIG. 6 shows schematically an embodiment where the impact element is stretched instead of compression to store energy and to provide desired stress.
- the impact element 2 is supported from its front to the end near the tool of the impact device, so that the element cannot move towards the rear of the impact device frame.
- the opposite end of the impact element is provided with a piston 4', so that a pressure fluid space 6' is formed between the frame of the impact device and the piston 4' on the side of the piston 4 1 facing the tool.
- the impact element is stretched by means of hydraulic fluid until the desired stress state is obtained.
- the hydraulic fluid in the pressure fluid space 6' is suddenly allowed to flow by means of a valve 14 shown schematically in the figure, so that the impact element 2 is shortened to its normal length, which results in a stress pulse propagating to the tool 3.
- a stress pulse is generated in the tool by means of an impact element that is subjected to either compression or tensile stress by a desired force to provide a desired stress state, whereafter the impact element is suddenly released from the stress state so that the tension is discharged either directly or indirectly to the end of the tool and further to the tool.
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Percussive Tools And Related Accessories (AREA)
- Earth Drilling (AREA)
- Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
- Road Signs Or Road Markings (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Surgical Instruments (AREA)
- Seal Device For Vehicle (AREA)
- Window Of Vehicle (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20011434 | 2001-07-02 | ||
FI20011434A FI116125B (fi) | 2001-07-02 | 2001-07-02 | Iskulaite |
PCT/FI2002/000590 WO2003004822A1 (en) | 2001-07-02 | 2002-07-01 | Impact device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1412606A1 true EP1412606A1 (de) | 2004-04-28 |
EP1412606B1 EP1412606B1 (de) | 2006-04-19 |
Family
ID=8561561
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02748898A Expired - Lifetime EP1412606B1 (de) | 2001-07-02 | 2002-07-01 | Schlagvorrichtung |
Country Status (13)
Country | Link |
---|---|
US (1) | US7013996B2 (de) |
EP (1) | EP1412606B1 (de) |
JP (1) | JP4202248B2 (de) |
KR (1) | KR100911637B1 (de) |
CN (1) | CN1309927C (de) |
AT (1) | ATE323820T1 (de) |
AU (1) | AU2002319328B2 (de) |
CA (1) | CA2452614C (de) |
DE (1) | DE60210779T2 (de) |
FI (1) | FI116125B (de) |
RU (1) | RU2351729C2 (de) |
WO (1) | WO2003004822A1 (de) |
ZA (1) | ZA200400016B (de) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI115613B (fi) * | 2002-05-08 | 2005-06-15 | Sandvik Tamrock Oy | Iskulaite |
FI116513B (fi) * | 2003-02-21 | 2005-12-15 | Sandvik Tamrock Oy | Iskulaite |
FI115451B (fi) * | 2003-07-07 | 2005-05-13 | Sandvik Tamrock Oy | Iskulaite ja menetelmä jännityspulssin muodostamiseksi iskulaitteessa |
FI121218B (fi) * | 2003-07-07 | 2010-08-31 | Sandvik Mining & Constr Oy | Menetelmä jännityspulssin aikaansaamiseksi työkaluun ja painenestekäyttöinen iskulaite |
FI116124B (fi) * | 2004-02-23 | 2005-09-30 | Sandvik Tamrock Oy | Painenestekäyttöinen iskulaite |
FI116968B (fi) * | 2004-07-02 | 2006-04-28 | Sandvik Tamrock Oy | Menetelmä iskulaitteen ohjaamiseksi, ohjelmistotuote sekä iskulaite |
FI20045353A (fi) * | 2004-09-24 | 2006-03-25 | Sandvik Tamrock Oy | Menetelmä kiven rikkomiseksi |
FI123740B (fi) * | 2005-01-05 | 2013-10-15 | Sandvik Mining & Constr Oy | Menetelmä painenestekäyttöisen iskulaitteen ohjaamiseksi ja iskulaite |
FI117548B (fi) * | 2005-03-24 | 2006-11-30 | Sandvik Tamrock Oy | Iskulaite |
SE528654C2 (sv) * | 2005-05-23 | 2007-01-09 | Atlas Copco Rock Drills Ab | Impulsgenerator och impulsverktyg med impulsgenerator |
SE528650C2 (sv) * | 2005-05-23 | 2007-01-09 | Atlas Copco Rock Drills Ab | Impulsgenerator och förfarande för impulsgenerering |
SE529036C2 (sv) * | 2005-05-23 | 2007-04-17 | Atlas Copco Rock Drills Ab | Metod och anordning |
SE528649C8 (sv) * | 2005-05-23 | 2007-02-27 | Atlas Copco Rock Drills Ab | Impulsgenerator, hydrauliskt impulsverktyg och förfarande för att alstra impulser |
SE528859C2 (sv) * | 2005-05-23 | 2007-02-27 | Atlas Copco Rock Drills Ab | Styranordning |
SE530467C2 (sv) | 2006-09-21 | 2008-06-17 | Atlas Copco Rock Drills Ab | Förfarande och anordning för bergborrning |
SE530571C2 (sv) * | 2006-11-16 | 2008-07-08 | Atlas Copco Rock Drills Ab | Bergborrningsförfarande och bergborrningsmaskin |
EP2845989B1 (de) * | 2013-09-09 | 2015-11-18 | Sandvik Intellectual Property AB | Stoßwellenmodifikation in Schlagbohrvorrichtung und Verfahren |
EP2873489B1 (de) * | 2013-11-13 | 2018-10-24 | Sandvik Mining and Construction Oy | Stoßvorrichtung und Verfahren zur Demontage dafür |
CN104691010A (zh) * | 2015-01-30 | 2015-06-10 | 胡俊 | 一种电动冲压头 |
EP3328591B1 (de) * | 2015-07-31 | 2024-02-07 | TEI Rock Drills, Inc. | Fernsteuerung von hub und frequenz einer schlagvorrichtung und verfahren dafür |
US11982906B1 (en) | 2018-03-05 | 2024-05-14 | Beam Engineering For Advanced Measurements Co. | Polarization-independent diffractive optical structures |
CN112983255B (zh) | 2019-12-16 | 2022-02-01 | 中国石油化工股份有限公司 | 钻井工具及确定其参数的方法 |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US879971A (en) * | 1907-07-10 | 1908-02-25 | Bradford H Locke | Rock-drill. |
US3162252A (en) * | 1962-08-03 | 1964-12-22 | James G Holland | Pile driving hammer |
NL6501373A (de) * | 1965-02-03 | 1966-08-04 | ||
US3570609A (en) * | 1968-11-14 | 1971-03-16 | Gen Dynamics Corp | Acoustic impact device |
US3662843A (en) * | 1970-01-29 | 1972-05-16 | Gen Dynamics Corp | Impact tools |
US3583498A (en) * | 1970-02-13 | 1971-06-08 | Ceg Corp | Impact hammer |
GB1373848A (en) * | 1971-03-27 | 1974-11-13 | Yutani Juko Kk | Hydraulic breaker operated by oil |
US3887018A (en) * | 1974-01-25 | 1975-06-03 | Murray L Jayne | Fluid driven hammers |
US4082152A (en) * | 1977-01-14 | 1978-04-04 | Hughes Tool Company | Cam mounting for an impact tool |
GB1566984A (en) * | 1977-05-04 | 1980-05-08 | Nippon Kokan Kk | Method and an apparatus of driving and extracting an article by strain energy |
US4256187A (en) * | 1978-11-30 | 1981-03-17 | Hughes Tool Company | Impact tool with hydraulic cocking mechanism |
SE463193B (sv) * | 1989-02-21 | 1990-10-22 | Atlas Copco Mct Ab | Anordning vid slaaende maskiner |
US4930584A (en) * | 1989-05-04 | 1990-06-05 | Easy Industries Co., Ltd. | Cracking device |
DE4103196C2 (de) * | 1991-02-02 | 1994-06-09 | Tracto Technik | Bohrgerät |
GB9600921D0 (en) * | 1996-01-17 | 1996-03-20 | Boart Longyear Technical Centr | Magnetostrictive actuator |
GB2328342B (en) * | 1997-08-13 | 2001-10-24 | Boart Longyear Technical Ct Lt | Magnetostrictive actuator |
JP3888492B2 (ja) * | 1997-12-19 | 2007-03-07 | 古河機械金属株式会社 | 衝撃装置 |
JP2002542383A (ja) * | 1999-04-19 | 2002-12-10 | ザ、プロクター、エンド、ギャンブル、カンパニー | 液状自動皿洗い洗剤製品の美観を改良するための非染色性着色粒子の製造方法、該粒子および組成物 |
-
2001
- 2001-07-02 FI FI20011434A patent/FI116125B/fi not_active IP Right Cessation
-
2002
- 2002-07-01 WO PCT/FI2002/000590 patent/WO2003004822A1/en active IP Right Grant
- 2002-07-01 EP EP02748898A patent/EP1412606B1/de not_active Expired - Lifetime
- 2002-07-01 AT AT02748898T patent/ATE323820T1/de not_active IP Right Cessation
- 2002-07-01 DE DE60210779T patent/DE60210779T2/de not_active Expired - Lifetime
- 2002-07-01 KR KR1020037017281A patent/KR100911637B1/ko not_active IP Right Cessation
- 2002-07-01 RU RU2004102688/03A patent/RU2351729C2/ru not_active IP Right Cessation
- 2002-07-01 CA CA002452614A patent/CA2452614C/en not_active Expired - Fee Related
- 2002-07-01 CN CNB028134109A patent/CN1309927C/zh not_active Expired - Fee Related
- 2002-07-01 AU AU2002319328A patent/AU2002319328B2/en not_active Ceased
- 2002-07-01 JP JP2003510566A patent/JP4202248B2/ja not_active Expired - Fee Related
-
2004
- 2004-01-02 US US10/749,381 patent/US7013996B2/en not_active Expired - Fee Related
- 2004-01-05 ZA ZA200400016A patent/ZA200400016B/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO03004822A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20040226752A1 (en) | 2004-11-18 |
AU2002319328B2 (en) | 2007-07-19 |
WO2003004822A1 (en) | 2003-01-16 |
EP1412606B1 (de) | 2006-04-19 |
KR100911637B1 (ko) | 2009-08-10 |
KR20040032118A (ko) | 2004-04-14 |
FI20011434A (fi) | 2003-01-03 |
RU2004102688A (ru) | 2005-03-27 |
ATE323820T1 (de) | 2006-05-15 |
RU2351729C2 (ru) | 2009-04-10 |
CA2452614C (en) | 2010-01-19 |
JP4202248B2 (ja) | 2008-12-24 |
CN1522334A (zh) | 2004-08-18 |
DE60210779D1 (de) | 2006-05-24 |
DE60210779T2 (de) | 2006-11-30 |
FI20011434A0 (fi) | 2001-07-02 |
JP2004533340A (ja) | 2004-11-04 |
US7013996B2 (en) | 2006-03-21 |
CA2452614A1 (en) | 2003-01-16 |
FI116125B (fi) | 2005-09-30 |
ZA200400016B (en) | 2004-08-17 |
CN1309927C (zh) | 2007-04-11 |
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